Which has better activity and maintenance signals?

Based on the RepoPilot analysis provided in the repository data:

facebookarchive/rebound shows a WAIT — Stale verdict with a last commit from 7 years ago. This indicates the project is no longer actively maintained.

proxyee-down-org/proxyee-down does not have an explicit staleness verdict in the provided analysis data, and the repository data includes more recent-looking content (frontend dependencies with modern packages like Vue 2.5.17, axios, etc.), suggesting more recent activity than rebound.

Conclusion: proxyee-down-org/proxyee-down has better maintenance signals. Rebound is archived and unmaintained, making it unsuitable for new projects requiring active support or security updates. The fact that facebookarchive/rebound is an archived repository (note the "facebookarchive" prefix) reinforces this — Facebook has explicitly archived it rather than continue maintenance.

If you're choosing between them for a new project, proxyee-down would be the safer choice from a maintenance perspective, though you should still verify its current activity status independently.

FOLLOW_UPS:

• What does Rebound's spring physics library actually do?
• How does proxyee-down use spring dynamics or animation?
• Are there active forks of Rebound with recent updates?